1; RUN: llc %s -start-after=codegenprepare -stop-before=finalize-isel -o - | FileCheck %s 2 3;; %y is unused and cannot (FIXME: currently) be salvaged. Ensure that the 4;; variadic dbg_value using %y becomes undef. 5 6; CHECK: ![[C:[0-9]+]] = !DILocalVariable(name: "c", 7; CHECK: DBG_VALUE $noreg, $noreg, ![[C]], !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value), debug-location 8 9target triple = "x86_64-pc-windows-msvc19.16.27034" 10define dso_local i32 @"?foo@@YAHHH@Z"(i32 %a, i32 %b) local_unnamed_addr !dbg !8 { 11entry: 12 %x = add i32 %a, %b 13 %y = mul i32 %x, %b 14 call void @llvm.dbg.value(metadata !DIArgList(i32 %x, i32 %y), metadata !16, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value)), !dbg !17 15 ret i32 %x 16} 17 18declare void @llvm.dbg.value(metadata, metadata, metadata) 19 20!llvm.dbg.cu = !{!0} 21!llvm.module.flags = !{!3, !4, !5, !6} 22!llvm.ident = !{!7} 23 24!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) 25!1 = !DIFile(filename: "test.cpp", directory: "/") 26!2 = !{} 27!3 = !{i32 2, !"CodeView", i32 1} 28!4 = !{i32 2, !"Debug Info Version", i32 3} 29!5 = !{i32 1, !"wchar_size", i32 2} 30!6 = !{i32 7, !"PIC Level", i32 2} 31!7 = !{!"clang version 11.0.0"} 32!8 = distinct !DISubprogram(name: "foo", linkageName: "?foo@@YAHHH@Z", scope: !9, file: !9, line: 1, type: !10, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !13) 33!9 = !DIFile(filename: "test.cpp", directory: "/") 34!10 = !DISubroutineType(types: !11) 35!11 = !{!12, !12, !12} 36!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 37!13 = !{!14, !15, !16} 38!14 = !DILocalVariable(name: "a", arg: 1, scope: !8, file: !9, line: 1, type: !12) 39!15 = !DILocalVariable(name: "b", arg: 2, scope: !8, file: !9, line: 1, type: !12) 40!16 = !DILocalVariable(name: "c", scope: !8, file: !9, line: 2, type: !12) 41!17 = !DILocation(line: 0, scope: !8) 42